Method for returning columns of data table as numpy arrays rather than lists
Docs
Merge pull request #534 from lanselin/newsphere

added geogrid to __all__ in sphere.py
Merge pull request #535 from sjsrey/by_col_array

Add method for extracting data columns as Numpy array rather than list
Merge branch 'master' of https://github.com/pysal/pysal into newsphere

# By Serge Rey
# Via Serge Rey (1) and others
* 'master' of https://github.com/pysal/pysal:
  Docs
  Method for returning columns of data table as numpy arrays rather than lists